If you are using AVG, when you are moving infected item to the virus vault you can get “ the Virus vault has reached maximum file count limit “ warning from AVG’s resident shield.

AVG is very effective against viruses. AVG detects latest viruses in real time through its resident shield. When AVG unable to remove the file, then it prompts user to move the file to Virus vault . User gets the virus vault warning message in doing so.

Why this warning shown by The AVG resident shield?

This warning caused by corrupted vvfolder.idx file in AVG vault folder which is hidden.